Democrats have been eyeing the candidacy of Marina Kats, the Republican challenging Rep. Allyson Schwartz, with a sense of uncertainty. Until now, they've been unsure about how much money she has and how much of it she's willing to throw into the 13th Congressional district race.

Kats' financial disclosure, filed this month with the House, could shed a little light. The suburban Philadelphia trial attorney has between $10.4 million and $42.4 million in assets, according to her disclosure. The range is broad because the forms only require candidates to list assets between certain dollar figures. But the conclusion is clear: Kats has a lot of money.

Compare her worth to Schwartz's. The two-term incumbent was worth between $1.3 million and $3 million, according to last year's disclosure. But Schwartz has a big fundraising advantage. She had $1.9 million in her campaign account through early April.

Kats is going to have to dig deep into her personal coffers if she is to make this a serious contest. Fortunately for her, she's got a lot in the bank.